Well, EVERYONE should use one. They have existed since at least 2500 BCE, where individuals in Harappa in India had a type of toilet in their houses.

John Harrington, in 1596, created the first toilet using water for his godmother, Elizabeth I of England and installed it at Richmond Palace, London. The Edinburgh-born London watchmaker, Alexander Cummings is credited with the first patented flushing toilet in 1775, complete with the now-familiar 's'-bend; to reduce nasty smells!

Modern toilets now boast either a 'S', 'U', 'J' or a 'P' bend!

Other facts:

'2.6 billion people (nearly half of the world's population) don't have access to toilets and proper sanitation.' source: www.worldtoilet.org

'An average person will visit the toilet 2500 times per year. That’s 6-8 times a day and totals to 3 years of your life.' source: www.2020site.org